Because people buy Garmins to last a long time, we also put special consideration on battery life testing. Battery life Collapse Garmins are known for extra long battery life. Training metrics Collapse Garmin has so many training features that even the pros probably don’t use all of them. That said, it muddies the waters if you’re trying to pick between the Epix Pro, Fenix 7, Fenix 7 Pro, and now, the Fenix 8. I don’t love that the battery life is short for a hybrid, at around three to four days.